Briefly describe sex chromosome aneuploidy disorders in Carnarvon

Abstract The term Klinefelter syndrome KS describes a group of chromosomal disorder in which there is at least one extra X chromosome to a normal male karyotype, 46,XY. The language difficulty experienced by these males possibly contributes to the challenges in behavioral and social domains [ 18 ].

The recurrence risk is not increased above that of the general population.

Consultation with a developmental-behavioral pediatrician is suggested. External link. Miller Jr. Advertisement Hide. In addition, 46,XX males also exist and it is caused by translocation of Y material including sex determining region SRY to the X chromosome during paternal meiosis.

The term Klinefelter syndrome KS describes a group of chromosomal disorder in which there is at least one extra X chromosome to a normal male karyotype, 46,XY.

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Secondary sexual characteristics Many 47,XXY boys appear to enter puberty normally with a tendency for testosterone concentrations to decline at late adolescence and early adulthood. XXY aneuploidy is the most common disorder of sex chromosomes in humans, with prevalence of one in males.

Adults are often evaluated for infertility or breast malignancy [ 9 ]. They manifest microcephaly with short stature, ocular hypertelorism, flat nasal bridge, and upslanting palpebral fissures. The majority of 47,XXY males rate themselves as more sensitive, apprehensive, and insecure than their peers.

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Differential diagnosis The physical manifestations of Klinefelter syndrome are often variable. In infancy, males with 47,XXY may have chromosomal evaluations done for hypospadias, small phallus or cryptorchidism [ 6 ]. Their IQ level is in the range of 60—80, with delayed speech and they are at risk for academic, behavioral, and social deficits.

Klinefelter's syndrome in the male infertility clinic. In addition, an occupational therapist may benefit infants with 47,XXY who have feeding problems or difficulty with latching on or sucking. As prospective, unbiased studied have reported their results in recent years, it has become clear that most XXY boys demonstrate reductions in speech and language abilities which are correlated with decreased reading and spelling achievement [ 4 ].

Briefly describe sex chromosome aneuploidy disorders in Carnarvon

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  • Sex Chromosome Disorders of Sex Development.. Sex chromosome aneuploidies, in mosaic and nonmosaic forms, result in recognizable syndromes such as Turner syndrome (45,X and associated karyotypes) and Klinefelter syndrome (47,XXY). Sex chromosome DSD are defined by aneuploidy of the sex chromosomes, X and Y. X&Y chromosome variations refer to conditions in which a child has an abnormal number of sex chromosomes, also known as X&Y chromosomes. Other words used to describe X&Y chromosome variations are sex chromosome anomaly, sex chromosome abnormality and sex chromosome aneuploidy.
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  • Sex chromosome aneuploidies (individuals with abnormal numbers of sex chromosomes) are found not infrequently in the general population and have characteristic deficits of cognitive ability: Individuals with an extra X chromosome (XXY or Klinefelter's syndrome, and XXX syndrome) have delays in the acquisition of language, as also do individuals with XYY syndrome. Sex chromosome aneuploidies comprise a relatively common group of chromosome disorders characterized by the loss or gain of one or more sex chromosomes. We discuss five of the better-known sex aneuploidies: Turner syndrome (XO), Klinefelter syndrome (XXY), trisomy X (XXX), XYY, and housebbs.info by: 7.
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  • There are four major sex chromosome abnormalities due to complete aneuploidy. Otherwise unassisted, infertility is practically inevitable in XXY Klinefelter syndrome and 45,X Turner syndrome. The other two conditions, XXX and XYY, apparently have little effect on fertility; furthermore, they are not discernibly associated with any increased risk for chromosomally abnormal offspring. What is aneuploidy. Aneuploidy is a genetic condition due to missing chromosome or having extra chromosomes. Aneuploidy is defined as change in chromosome number that is not the exact multiple of the haploid karyotype 1).Aneuploidy interferes with growth and development of an organism and frequently causes lethality and has been associated with disease, sterility, and solid tumors formation 2).
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  • Human genetic disorders can also be caused by aneuploidies involving sex chromosomes. These aneuploidies are better-tolerated than autosomal ones because human cells have the ability to shut down extra X chromosomes in a process called X-inactivation. You can learn more in the article on X chromosome inactivation. Apr 28,  · Sex Chromosomes Definition. Sex chromosomes are chromosomes that determine whether the individual is male or female. Though these two chromosomes pair with each other during meiosis, there is usually very minimal homology or recombination between them, primarily because of a large difference in their genetic content and housebbs.info one chromosome is smaller, and appears to .
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  • The term Klinefelter syndrome (KS) describes a group of chromosomal disorder in which there is at least one extra X chromosome to a normal. Carrier screening to help detect the risk of having a baby with a specific inherited disorder, such as cystic fibrosis. Pediatric. Analyzes chromosomes.
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